Reference

Performs a deep copy of a node-set or value into the result tree, preserving all descendants, attributes, and namespaces.

Creates an element node in the result tree with a name computed at runtime from an XPath expression.

Provides fallback content to execute when an enclosing extension element or unrecognised instruction is not supported by the processor.

Iterates over a node-set or sequence, applying the contained template body to each item in document order.

Groups a sequence of items by a key expression or adjacent values, then iterates over each distinct group.

Processes a streamed sequence in multiple independent branches simultaneously, enabling multiple aggregations in a single pass over a large document.

Defines a named, callable stylesheet function available in XPath expressions throughout the stylesheet.

Conditionally outputs content when a boolean XPath expression evaluates to true; has no else branch.

Imports another stylesheet at a lower import precedence, allowing the importing stylesheet to override any of its declarations.

Imports an XML Schema to enable schema-aware processing, typed variable declarations, and validation of input and output documents.